Captain Ian Sharps is battling to be fit in time for Shrewsbury.
The defender was troubled by a hernia towards the end of the regular season while a thigh and groin problem forced him off after just 25 minutes of the first leg at Plainmoor.
Sharps is rated as a doubt but Shrews boss Graham Turner is leaving no stone unturned in a bid to get his inspirational leader fit.
Right-back David Raven is in the same boat as Sharps as he looks to recover from the thigh strain that ruled him out on Saturday.
The game has fallen on the day of the club's 125th anniversary and Shrewsbury will hope to make it a double celebration by overturning a 2-0 first-leg deficit and setting up an Old Trafford final against either Stevenage or Accrington.
Torquay boss Paul Buckle has no injuries or suspensions to contend with as his side look to finish off the job.
The Gulls take a 2-0 lead to Greenhous Meadow on Friday night, with goals from Chris Zebroski and Eunan O'Kane in Saturday's first leg putting them on course to reach the final.
Buckle, who has been linked with the managerial vacancy at Bristol Rovers, could name an unchanged side after an impressive performance in the first leg, with on-loan forward Jake Robinson once again expected to line-up against his parent club.
If the Devon outfit see off Graham Turner's side, they will face either Stevenage or Accrington in the final as they look to secure promotion via the play-offs for the second time in the last three seasons.